Datasheet

PCA9539_PCA9539R All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 8 — 26 November 2014 4 of 38
NXP Semiconductors
PCA9539; PCA9539R
16-bit I
2
C-bus and SMBus low power I/O port with interrupt and reset
4. Block diagram
Remark: All I/Os are set to inputs at reset.
Fig 4. Block diagram of PCA9539; PCA9539R
PCA9539
PCA9539R
POWER-ON
RESET
002aad722
I
2
C-BUS/SMBus
CONTROL
INPUT
FILTER
SCL
SDA
V
DD
INPUT/
OUTPUT
PORTS
IO0_0
V
SS
8-bit
write pulse
read pulse
IO0_2
IO0_1
IO0_3
IO0_4
IO0_5
IO0_6
IO0_7
INPUT/
OUTPUT
PORTS
IO1_0
8-bit
write pulse
read pulse
IO1_2
IO1_1
IO1_3
IO1_4
IO1_5
IO1_6
IO1_7
A1
A0
RESET
LP
FILTER
V
DD
INT